Abstract
In this paper, a combined cooling, heating and power (CCHP) system with gas engine is used to provide energy demand of a commercial cold storage and its techno-economic evaluation is performed compared to the traditional systems. Also, a cold storage facility to store orange crop during the period of entry and storage is analyzed. The thermal loads of the cold storage are calculated and an appropriate water-ammonia absorption chiller is designed and optimized. Then, changes in the energy and economic parameters are analyzed versus the main effective parameters. The results show that the use of this CCHP system under a heat supplying strategy with the possibility of selling electricity to the network, leads to reductions of fuel consumption and system operating costs about 78.85% and 81.34% compared to the conventional systems, respectively. Also, the payback periods by considering the interest rate and without it are determined 4.075 and 2.701 years, respectively. Also, according to the results obtained and the study of the ratio of fuel to power, the best operating point of the system from technical and economic viewpoints is achieved at a fraction of 80% load and the overall efficiency of the system is evaluated about 89.59%.
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